.base-preview-box{
  position: fixed;
  top:0;
  left: 0;
  bottom:0;
  right: 0;
  height: 100%;
  width: 100%;
  background-color: #333333;
  z-index: 10000;
}
.base-preview-img{
  width: 100%;
  height: 80%;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}